SKU: 85494496369

FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024

Sale price$1687.50 Regular price$1875.00
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Ships within 48 hours · Estimated delivery Jul 21 - Jul 26

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Description

FI Exhaust Valvetronic Cat-Back System For Audi S4 / S5 (B9) 2018-2024Audi B9 S4 Fi Exhaust (Frequency Intelligent Exhaust) high performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high grade T304 stainless steel that offers an exhilarating soundtrack. The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the overall performance and torque. On average horsepower is expected to increase from 5 10% after installing a full

Audi B9 S4 Fi Exhaust (Frequency Intelligent Exhaust) high-performance valvetronic exhaust system is direct replacement bolt on system manufactured out of a high-grade T304 stainless steel that offers an exhilarating soundtrack.

The Fi EXHAUST system is designed with a valvetronic technology to control airflow, sound volume and enhance the overall performance and torque. On average horsepower is expected to increase from 5-10% after installing a full catless system, which includes a valvetronic catback and ultra-high flow downpipe.

When valves are closed exhaust gasses are routed through the muffler resulting in a low-profile comfortable drive. However, when the valves are fully open an intense and sporty soundtrack is produced.

Depending on your car model and exhaust setup, switching exhaust valves between street and race modes may be achieved using a factory exhaust/sport button, drive modes, or by selecting the Fi Pro remote control upgrade. Please note that not all options are available for every model. Refer to the available section and contact our representative for confirmation.

The unique sound and performance for Audi B9 S4 is achieved through individually designed muffler internals that are fabricated to offer an ultimate driving experience.

Please note each part of the Fi EXHAUST system needs to be ordered separately.
Different exhaust parts are offered depending on the vehicle version.

Please note that the actual product may vary in appearance depending on the year of the car and area. The exhaust system is also subject to changes to the design over an extended time period. Product pictures are for illustration purposes only.


Catback Exhaust:
Front Pipe + Mid X-Pipe + Valvetronic Muffler + Quad Silver Tips + Standard remote control system module (AD-S4B9-CBV + TIP6389S*4 + R2016OL + OBD-CAB-V)

Downpipes (Optional):
1.Ultra High Flow DownPipe (AD-S4B9-NCAT)
2.Sport 200 cell DownPipe (AD-S4B9-CAT200)

Tips (Optional):
1.Quad Tips in Titanium Blue (TIP6389TB*4)
2.Quad Tips in Diamond Black (TIP6389B*4)
3.Quad Tips in Gold (TIP6389G*4)
4.Quad Tips with Carbon Fiber (TIP6389C*4)

Fi EXHAUST Pro Remote Control System (Optional):
OBD2/Mobile APP Remote Control System Module (R2020OBD)

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 85494496369

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John Jones
Alexandria, US
★★★★★ 5
Clear display
Style: Wi-Fi, Size: 128GB, Color: Blue, Configuration: Without AppleCare+
I got this to replace an old iPad Pro. It does everything my old pro did, except for having a smaller screen. Good value and set up and migration from old iPad was super easy. Good battery life and so far playing games on it haven't been an issue
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Reviewed in the United States on May 30, 2026
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Pug lover
Boise, US
★★★★★ 5
New Ipad
Style: Wi-Fi, Size: 256GB, Color: Yellow, Configuration: Without AppleCare+
Nice size with a nice clear picture. Replaced a very old iPad. Not all apps and things transferred like the iPhone. But very manageable with a little time. So far I am pleased with this iPad.
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Reviewed in the United States on June 6, 2026
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Mads
Dallas, US
★★★★★ 4
Its Great! Except one tiny detail
Style: Wi-Fi, Size: 512GB, Color: Pink, Configuration: Without AppleCare+, Style: Wi-Fi, Size: 512GB, Color: Pink, Configuration: Without AppleCare+
Ipad works great, easy to set up and everything transferred from the cloud from a backup I had (thank god because my other ipad is completely dead). Everything is in order except they put the magnets in the wrong spot xD. It doesnt matter functionality wise and I feel its more hassle to exchange than its worth so I am going to keep the iPad. With the case its in it doesnt really matter because theres a spot already for the pen. 4/5 stars
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Reviewed in the United States on May 13, 2026
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Riz
San Leandro, US
★★★★★ 5
Great iPad
Style: Wi-Fi, Size: 128GB, Color: Blue, Configuration: Without AppleCare+
Great iPad, so much faster and stable than our old one (5th generation). Totally worth the price to upgrade.
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Palmetto Dan
Belleville, US
★★★★★ 5
Best Kids iPad Case - Durable and Perfect Protection!
Color: A01-Colorful Pink
This BRAECN kids case for iPad is absolutely perfect! The heavy-duty rugged silicon construction provides outstanding protection for my child's iPad. I love how durable and shock-absorbing it is - it has already survived multiple drops without any damage to the tablet. The fun, colorful design is eye-catching and appealing to kids. The built-in handle is genius - it makes it easy for little hands to carry the iPad around safely. The stand functionality works perfectly for watching videos or doing homework hands-free. The case fits my iPad 11th generation perfectly with precise cutouts for all ports and buttons. Everything remains easily accessible while staying fully protected. The material is high-quality, non-toxic, and safe for kids. It's easy to clean when it gets sticky fingerprints or spills. The grip is excellent, making it less likely to slip from small hands. The raised edges provide extra screen protection when laid face-down. Installation was quick and easy. The case adds minimal bulk while providing maximum protection. This gives me complete peace of mind letting my child use the iPad. Best kids iPad case I've found - highly recommend!
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Reviewed in the United States on January 8, 2026

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